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Silver 2U rackmount barebone server chassis, front drive bays visible

ASUS

ASUS RS520A-E12-RS12U-16W1G2.5R 2U barebone server

SKU CH-8HPV-MAE02 MPN RS520A-E12-RS12U-16W1G2.5R

2U rackmount barebone supports one AMD EPYC 9004 processor up to 400W, 24 DDR5 slots for 6TB, 16 SATA/SAS/NVME bays, dual 1600W 80 Plus supplies, and up to four single-slot GPUs

  • ProcessorSupports AMD EPYC 9004 Series Processors (up to 400 W)
  • Installed RAMNo Memory Installed
  • Form factor2U Rackmount
  • Processor socketSocket SP5
  • Target workloadGeneral Purpose Server
  • Preinstalled processorNo CPU Installed
  • Supports AMD EPYC 9004 processors up to 400W for high compute density
  • 24 DDR5 memory slots deliver up to 6TB capacity across 12 channels
  • 16 SATA/SAS/NVME bays plus 2 M.2 slots enable massive local storage
  • Up to 4 single-slot or 2 double-slot GPUs accelerate AI and HPC workloads
  • 1600W redundant 1+1 80 Plus power supply ensures continuous uptime

2U Rackmount Barebone for AMD EPYC 9004

This 2U rackmount barebone server supports a single AMD EPYC 9004 Series processor up to 400W on a Socket SP5 platform. It ships without CPU or memory, allowing custom configuration for general-purpose workloads. The chassis includes a 1600W redundant 1+1 power supply rated at 80 Plus.

Suits builders needing dense storage and GPU options

With 16 SATA/SAS/NVME bays, two M.2 slots and support for up to four single-slot or two double-slot GPU cards, it fits storage-heavy and accelerated compute tasks. Buyers who require dual-socket scaling should look elsewhere. The single 1 Gigabit LAN port also limits high-speed networking needs.

24 DDR5 slots with 12-channel architecture

The platform provides 24 x 288-pin slots supporting DDR5 4800/4400/4000/3600 RDIMM and 3DS RDIMM up to 6TB total capacity. This 12-channel memory subsystem is the decisive spec for memory-bandwidth-sensitive deployments.

How it compares

Measured against everything we stock in Barebone Servers & DIY Kits, at today’s prices. Recalculated every night.

Price $2,051.99
Cheaper than about 62% of the 532 comparable items (median $2,503.49).

New to this? Buying server hardware with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameASUS
Model nameRS520A-E12-RS12U-16W1G2.5R
Target workloadGeneral Purpose Server
Processor
ProcessorSupports AMD EPYC 9004 Series Processors (up to 400 W)
Processor socketSocket SP5
Preinstalled processorNo CPU Installed
Max supported CPUs1
Processor detailsSupports 4th Generation AMD EPYC Processors with AMD 3D V-Cache technology
AMD EPYC 9004 Series Processors (Air cool with STD HSK up to 400 W)
Memory
Installed RAMNo Memory Installed
RAM slots24 × 288Pin
Maximum supported memory6 TB
Supported memoryDDR5 4800/4400/4000/3600 RDIMM/ 3DS RDIMM
Memory channels12 Channel
Storage
Preinstalled storageNo Storage Installed
SATA ports16 x SATA/SAS/NVME
M.2 slots2
2.5" bays2 × 2.5 in SATA hot-swap drive bays (Rear)
3.5" bays12 × 3.5 in hot-swap drive bays (Front)
Connectivity
Primary LAN controllerIntel I350-AM2
Top LAN speed1 Gigabit
Ports & slots
PCIe slotsUp to 5 PCIe Gen5 slots + 1 OCP3.0
2 x PCIe Gen5 x16, FHFL or 4 x PCIe Gen5 x8, FHFL
1 x PCIe Gen5 x8, LP
1 x OCP 3.0 Slot ( (PCIe Gen5 x16)
Front USB ports2 x USB 3.2 Gen1
VGA ports1 x VGA (Front), 1 x VGA (Rear)
Rear USB ports2 x USB 3.2 Gen1
Ethernet port2 × 1GbE
Power
Power supply1600 W Redundant 1+1, 80 Plus
Size & build
Form factor2U Rackmount
Product dimensions33.17 in × 17.68 in × 3.47 in
Product weight39.57 lb (17.9 kg)
Shipping weight18.15 kg
Package size843 × 449 × 191 mm
Compatibility
Support gpusUp to 4 single-slot or 2 double-slot GPU cards

Questions about this item

Which AMD EPYC 9004 processor and DDR5 RDIMM modules must I supply for this barebone?

Install one Socket SP5 AMD EPYC 9004 series CPU up to 400W and populate the 24 288-pin slots with DDR5 4800/4400/4000/3600 RDIMM or 3DS RDIMM across 12 channels.

Can my existing SATA and SAS drives use the 16 bays while I add NVMe U.2 or M.2 devices?

The 16 bays accept SATA, SAS and NVMe together, and the two M.2 slots provide additional NVMe capacity without adapter cards.

How do I confirm the redundant 1600W power supply and Intel I350-AM2 LAN are operating after build?

Check the front-panel power-supply LEDs for green on both units and verify a 1 Gigabit link light on the I350-AM2 ports in the OS network stack.

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